package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.alibaba.nacos.client.utils.StringUtils;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;
    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewcontroller:将请求和页面映射过来
     */

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone")String phone) {

        //TODO 1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60秒不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2、验证码的再次校验，redis,存key-phone，value-code  sms:code:111111->1234
        String code = UUID.randomUUID().toString().substring(0, 5);
        String s = code+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码。
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,s,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     *
     * //TODO 重定向携带数据，利用session原理。将数据放在session中。
     *       只要跳到下一个页面去除这个数据之后，session里面的数据就会删掉
     *
     *  //TODO 1、分布式下的session问题
     * RedirectAttributes redirectAttributes:模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){

        if (result.hasErrors()){
            Map<String,String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField,FieldError::getDefaultMessage));

            //model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
//            return "reg";
//            return "forward:/reg.html";
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、校验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码，令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过//真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //注册成功回到首页，回到登录
                    return "redirect:/login.html";
                }else {
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
//            return "reg";
//            return "forward:/reg.html";
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes) {

        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode()==0) {
            //成功
            return "redirect:http://gulimall.com";
        }else {
            HashMap<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("error",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
//    @GetMapping("/login.html")
//    public String loginPage() {
//        return "login";
//    }
//
//    @GetMapping("/reg.html")
//    public String regHtml() {
//        return "reg";
//    }
}
